The Fieldpiece JL3MN Wireless Manometer is the go-to single-port probe for static air, LPG / natural gas and burner draft pressure checks. Built for licensed tradies and apprentices who want faster, cleaner pressure testing with fewer hoses and fewer headaches. Pair it with the Job Link® app, slap it on the test port with the strong magnet, and you’re off—too easy.

Key features & trade benefits

• 1,000’ (305 m) wireless range — Test solo across plant rooms or roof decks without babysitting the gauge.
• Magnetic, precise placement — Short tubes = fewer tangles and cleaner setups on tight furnaces and air handlers.
• Static, gas & draft pressure in one — Cover routine commissioning and diagnostics without swapping tools.
• Job Link® app logging (up to 8 readings) — Capture clear pressure trends for client reports and compliance—no more “he said, she said” call-backs.
• High accuracy at low pressure — Nail critical readings like 0–2 inWC where many jobs go pear-shaped.
• Rugged, trade-ready build — Metal tip and Fieldpiece durability that can cop a knock and keep working.

Why this product matters

Real talk: when you’re up on a roof in 40-degree heat and the builder’s chasing handover, you don’t want spaghetti hoses. A Brisbane contractor told us his team swapped to the JL3MN for ducted commissioning—fair dinkum, they cut testing time because they could magnet the probe in place, grab stable static pressure, and log it to the report in one hit. If you routinely balance air or verify gas pressures, this is a ripper upgrade.

Browse all pressure tools here: HVAC Manometers Collection.

Pro tip

Before low-pressure measurements (< 2 inWC), zero the probe at ambient with tubing attached and take the reading within a minute for best accuracy. Use the included static tip with the arrow facing airflow for reliable results. No worries.

Compatibility & system info

• Media: Dry, non-corrosive gas only (static air, LPG, natural gas, burner draft).
• App: Job Link® iOS/Android (BLE 4.0; iOS 7.0+ / Android 5.0+).
• Use cases: Static pressure at return/supply, total external static, gas inlet/outlet, filter and coil pressure drops.
• Standards: Use in accordance with AS/NZS gas installation practices and site WHS requirements.

Local jobsite note

Whether you’re verifying gas pressure in a Sydney plant room or checking total external static on a Brisbane rooftop unit, the long wireless range and magnet mount make solo testing straightforward—even around risers and tight access ways.

What’s included

• JL3MN Manometer Probe
• ASP2 Static Pressure Probe and Hose
• Brass Screw Fitting with Extra Hose
• Slide Gas Adapter
• 2 × AAA Batteries

Specifications

Warranty & returns

1-Year Manufacturer’s Warranty from date of purchase. Excludes consumables (filters, gaskets, leads, batteries, fuses, sensors, case, etc.). Standard Australian consumer guarantees apply.

FAQs

Can the JL3MN do differential pressure?

It’s a single-port probe. For ΔP, use two JL3MN probes or step up to the JL3KM2 dual-port kit and view both points simultaneously in the app.

Related products (helpful picks)

• Need ΔP on one screen? Grab the Fieldpiece JL3KM2 dual-port kit for simultaneous P1/P2 and real-time drops—great for filters and coils.
• Tight ducts? Add the JL3RH wireless psychrometer to pair air temps/RH with your pressure data.
• Full system snapshot? The JL3KH6 charge & air kit rounds out a Job Link toolbox for charging and airflow checks.